Automatic gas cut-off.



PATENTED MAY 9, 1905.

B. 1). HEMPSTED. AUTOMATIC GAS GUT-OFF.

APPLICATION FILED IEB.2, 1905.

v awvento'r- Eur/76,9172? &

Patented May 9, 1905.

PATENT OFFICE.

BURNS D. HEMPSTED, OF OROTON, OHIO.

AUTOMATIC GAS CUT-OFF.

SPECIFICATION forming part of Letters Patent N0. 789,277, dated May 9,1905.

Application filed February 2, 1905. Serial No. 243,904.

To all whmn it nuty concern.-

Be it known that I, BURNS D. HEMPSTED, a citizen of the United States,residing at Oroton, in the county of Licking and State of Ohio, haveinvented certain new and useful Improvements in Automatic Gas Out-Offs;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in automatic gascutoff mechanism.

The object of the invention is to provide a device of this characterwhereby should a gas-light to which the same is applied be casuallyblown out the flow of gas to said burner will be automatically stopped.

A further object is to provide a cut-off mechanism which will be simplein construction, efiicient and reliable in operation, and well adaptedto the purpose for which it is designed.

With these and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of thedevice, showing the same applied to the burner of a gas-stove; and Fig.2 is a vertical sectional view of the same 7 Referring more particularlyto the drawings, 1 denotes a valve-chamber, with which are connected agas-inlet pipe 2 and an outletpipe 3. Within the valve casing 1 isarranged a valve 4, which is adapted to engage a seat 5, formed in apartition 6, which is arranged between the gas inlet and outlet ports ofthe valve-casing. The valve 4 is provided with a stem 7, which isslidably mounted in and projects through a gland8 in said valvecasing.Around the valve-stem 7 is arranged a coilspring 9, which bears againstthe valve 4 at one end and against an annular flange 10, formed in thevalve-casing 1, as shown.

The outer end of the valve-stem 7 is pivotally connected to a lever 12,one end of which is pivotally mounted in a standard 13, secured to thevalve-casing 1. Secured to the opposite side of the valve-casing is abracket 14, in which is pivotally mounted a prop 15, with the upper endof which is adapted to be engaged the free end of the lever 12. The prop15 is of such length that when engaged by the lever 12 the valve 4 willbe held out of engagement with the seat 5, thus allowing the passa e ofgas through the valve-casing.

With the prop 15 is pivotally connected a thermostat-bar 16, which isadapted to be arranged in the flame of the as-burner and to be heatedthereby. In order that the valve may be held out of engagement with theseat 5 to permit the passage of gas through the valve-casing while thethermostat-bar is being heated, a temporary support is provided for thelever 12. Said support may be of any suitable construction, but is hereshown as consisting of a block or bar 17, which is adapted to be placedupon the upper end of the valve-casing in position to support the freeend of the lever 12, said block being of such thickness as to hold saidlever and the valve connected thereto high enough to disen age the valvefrom its seat. The bar or b ock 17 may, if desired, be connected by achain or other flexible connection 18 to the valve-casing 1, which willprevent said block from becoming loose or mislaid.

In operation when it is desired to light the gas-burner the lever 12 islifted and held up by the block 17 thus opening the valve 4 andpermitting the gas to flow through the pipes 2 and 3 to the burner. Thethermostat-bar 16 being arranged in the flame of said burner will soonbecome heated, and consequently will expand, thus forcing the prop 15beneath the end of said lever 12, after which the block 17 may beremoved. Should the flame of the burner be extinguished from any causeafter the parts have been arranged as de scribed herein, thethermostat-bar will cool and in cooling will contract, thereby drawingthe prop 15 from beneath the lever 12, which will permit the spring 9 toforce the valve 4 into engagement with its seat, thus cutting off theflow of gas to the burner and preventing further escape of the same.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a device of the character described, the combination with anautomatically-closing valve, provided with a stem, of a lever connectedto said stem and pivoted to a standard, a prop adapted to support saidlever and hold said valve in an open position,

and a thermostat adapted to disengage said said valve 1n open positionafter the removal of said block, and a thermostat adapted to disengagesaid prop from said lever, thereby permitting said valve to close,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

BURNS D. HEMPSTED.

Witnesses:

H. G. KELLY, R. L. WOODWORTH.

